Power-actuated safety-razor



W. T. ROSE.

POWER ACTUATED SAFETY RAZOR.

APPLICATION FILED JUNE 19, 1919.

Eaten Apr. 12, 1921.

Fig. 4.

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Inventor; William .TIRose, 5y

torrzey,.

FFICE.

WILLIAM T. ROSE, OF WATER/LOO, IOWA.

POWER-AGTUATED SAFETY-RAZOR.

Specification of Letters Patent.

Patented Apr. 12, 1921-.

Application filed .Tune 19, 1919. Serial No. 305,305.

T all whom it may concern:

Be it known that I, WILLIAM T. Rose, a

I citizen of the United States of America, and

. Razors, of which the following is a speci- My invention relates to improvements in power actuated safety razors, and the object of my improvement is to provide means for reciprocating the blade of a safety razor,

which means shall be simple, light, inexpenv sive, noiseless and convenient for manipulation in use, as also easy to assemble or disassemble.

This object I have accomplished by the means which are hereinafter described and claimed, and which are illustrated in the accompanying drawings, in which Figure 1 is a medial longitudinal section of my improved device; Fig. 2 represents the different parts or elements of my-improved device as disassembled from each other and placed in their order of succession, with the elements shown in perspective; Fig. 3 is a plan of said device as assembled; Fig.4 is an elevation of the blade holding means,

and Fig. 5 is an elevation of the blade,

while Fig. 6 is a cross-section of the hollow shank of the device, taken at the locariorly,

tion of the annular spring 10 thereon.

Similar numerals of reference denote cor-.

responding parts throughout the several views.

The rectangular blade 1 ofmy device is of the so-called wafer type and has rectangular slots 2 along its medial longitudinal line, and also has on the same line and positioned between saidslots, small circular orifices to receive screws 3 which secure it removably to a block 4, the latter being shown in said Figs. 1 and 2. The block 1 is rectangular in plan and has a medial vertical elongated socket 5 for a purpose to be described. The numeral 1O denotes the backing-plate for the blade 1 and is of similar rectangular form, of slightly greater length, and provided on its opposite longitudinal edges with small detents projecting beyond the cutting edges of the blade. This backing-plate has an integral rearward extension or boxing 11, rectangular intewith its hollow 12 longer than the said block 4 but of like vertical height to permit said block reciprocatory scope of movement when mounted therein. with the blade 1 in contact with the front face of.

cure it to the backing plate 10 after being ressed through the slots 2 in the blade 1.

lliptical plate springs 7 are mounted between the heads of said screws 8 and the abutting face of said guard-plate to bear resiliently at their opposite ends thereagainst. The springs are provided with elongated longitudinally disposed slots 9,

and the heads of the screws 8 are excised on opposlte sldes to adapt them for passage through the slots 9, and they may be then turned across said slots, as shown in Fig. 4, to mount the springs removably.

The boxing 11 and the contained reciprocatory block 4 may be otherwise formed, but are shown as being diminished in thickness downwardly in order to mount the hollow cylindrical shank 15 of the device there on at a convenient angle for use relative to the position of the blade 1. Said shank 15 has a rectangular outwardly directed beveled flange 13 which may be removably fastened in registration upon the rear face of the boxing 11 by means of screws 14. A rotatable cylindrical element or shaft 21 is mounted within the shank 15 coaxially,

being of somewhat less interior diameter, I

I but rotatable within inner annular bearing forward movement. The forward end 31 of the shaft 21 which projectsbeyond said flange 19 is diminished and threaded to receive a removable head 22 of cylindric form which fits the interior bore of said shank.

An eccentric crank-pin 23 is fixed on the forward face of the head 22 and upon said pin in loosely mountedlan anti-friction atively into the slot in said block 4.

The numeral denotes a flexible powershaft formed of helical spring wire and rotated by a power-plant not shown. A cylindric head 29 is fixed on the free extremity of the flexible shaft 30 and has a diminished extremity seated removably in a hollow, coaxially, of the rear end of the shaft-part 21. The part 21 and its flange 25 are longitudina lly slotted at 26 on one side'to receive a feather or spline 27 on the head 29 to permit the latter to rotate the former. The

shank 15 has an annular groove 16 in which is seated the annular spring 17, the latter being in the form of a split-ring, with one end 32 bent inwardly to pass through an orifice 18 in the shank, entering and engaging an annular groove 28 in the head 29. By this means, said flexible shaft is releasabl connectedvto said shaft-part 21.

en the flexible shaft 30 and the associ ated shaft-part 21 are rotated, the crank-pin 23 with its sleeve 24 moves rotatably and slidably within the socket 5 to rapidly reciprocate the block 4 and razor-blade 1. The user can conveniently employ the device in the shaving operation, shifting it as desired, and attention is especially called to the fact that the double-edged blade, with its guards, may have either cutting edge employed without the necessity for rocking the device as a whole, it only being necessary to slightly tilt the device tobring either edge into opera tion.

As the moving parts are so few and are mounted frictionlessly, the device is noiseless and free from shock.

Various modifications'may be made in this device without departing from the scope of the invention.

Having described -my invention, what I claim as new and desire to secure by Let- .ters Patent, is:'

In a device of the character described, a double-edged blade, a holder therefor comprising bodies between which the blade is removably mounted for limited reciprocation with both cutting edges exposed, one body having a hollow shank with a widened head provided with a rectangular hollow bearing, said blade having a vertically slotted rectangular shank removably mounted thereon 'and mounted to reciprocate in and being of less length than the widened. hollow of said head, a "shaft mounted rotatably and removably in said hollow shank and having a removable head provided with a crank-pin, the,latter seated movably in the slot in the blade-shank, and a flexible rotatable operating shaft detachably connected to said firstmentioned shaft and adapted to be rotated by power-driven means.

Signed at Waterloo, Iowa, this 31st day of May, 1919.

WILLIAM T. ROSE. 

